Berkeley Cement originated in 1947 according to its website; however, I have documented three examples of a Berkeley Cement stamp from 1946 with a horseshoe design. At first it was a partnership between Alfred Marian Fadelli (1911-1985) and Frank Massaro, of Triberti & Massaro fame, that was dissolved in 1958.
Alfred’s sons, the late Andrew A. Fadelli and Ronald Fadelli, joined the firm soon after. Why “A. Fadelli Sons” is on their stamp is unclear; the name was never used formally that I can tell, and Alfred was alive and listed with the sons in the 1967 directory. Perhaps the sons specialized in sidewalks in their early years.
The firm, still owned and run by the Fadelli family, offers a wide range of construction services with union labor.
Most examples of the A. Fadelli Sons stamp are undated. I have found only a few dated 1962, and all examples appear to be around that age.

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